Waste heat recovery device



FIG. 1 is a perspective view of a waste heat recovery device, showing my new design;

FIG. 2 is a side elevational view thereof; and

FIG. 3 is a rear plan view thereof; and

FIG. 4 is a top plan view thereof; the base plan view being a mirror image thereof;

FIG. 5 is a front elevational view thereof. 

The ornamental design for a waste heat recovery device, as shown and described. 